“Clouds currently cover about two-thirds of the planet at any moment,” Natalie Wolchover writes for Quanta. “But computer simulations of clouds have begun to suggest that as the Earth warms, clouds become scarcer. With fewer white surfaces reflecting sunlight back to space, the Earth gets even warmer, leading to more cloud loss. This feedback loop causes warming to spiral out of control.”

The previous post here mentioned 19th-century cloud chambers, and I was accordingly struck by a quick line in Vanhoenacker’s book. At one point, he describes the construction of airplane bodies inside sprawling factory buildings, whose contained volumes of air are so enormous they can generate their own weather. They are internal skies.

“Some airplane factories are so large,” he writes, “that clouds once formed inside them, a foreshadowing of the sky to come for each newborn jet.”

Of course, other megastructures are also known to produce internal precipitation. NASA’s Vehicle Assembly Building at Cape Canaveral “is the second largest building (by volume) in the world, and it even has its own weather inside—NASA employees report that rain clouds form below the ceiling on very humid days.”

As architecture writers like David Gissen and Sean Lally have shown, architecture—in and of itself—has always been a kind of applied atmospheric design, with buildings defined as much by temperature, barometry, and humidity as they are by walls and ceilings.

But I love the idea of aircraft assembly and repair occurring amidst inadvertent simulations of the sky to come, as dew points are crossed, condensation begins, and internal weather fronts blurrily amass above the wings of dormant airplanes, as if conjured there in a dream.